Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1989-01-24
1990-01-23
Bell, James J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
1062811, 106282, 428143, 428280, 428484, D04H 158
Patent
active
048957542
ABSTRACT:
Use of surface modification treatment on mineral fines to obtain higher filler loadings in asphalt used for roofing shingles. Mineral fines are coated with oil such as a petroleum oil at about the 0.25-1.0 percent level before they are incorporated into molten asphalt. This treatment makes minerals which otherwise would be uncompetitive with traditional fillers, such as limestone, sufficiently compatible with asphalt to be a viable alternative to limestone. Nepheline syenite mineral fines treated in this manner have been successfully incorporated into asphalt for shingles at a loading of 65-70%.
REFERENCES:
patent: 4382989 (1983-05-01), Chang et al.
Smith, D. J., "Density of Mineral Stabilizers in Asphalt Roofing Coatings", Roofing Systems, ASTM STP 603, American Society for Testing and Materials, 1976, pp. 57-103.
George Billy L.
Graham Joseph
Bell James J.
Kirn Walter N.
Little Douglas B.
Minnesota Mining and Manufacturing Company
Sell Donald M.
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